Shipping and Marine
| Wed 08 Apr 2026
Beijing, April 9 -- Dalian Shipbuilding Industry has obtained a patent for large-diameter stainless steel pipe welding tool. This invention was developed by Li Gang, Xu Zhisheng, Liu Yuntao, Bai He, Lu Xuqing, Jin Liang, Zhou Weiwei, Xu Han, Wang Peng, Qu Xuejian, Wang Hai and Wang Zhitao.
The patent application number is CN202..